Effect of Soft Particle Peening Treatment on Fatigue Strength of Copper Alloy
Author: Koichiro NAMBU a) and Ryuji KUNIMATSU a) a) Osaka Sangyo University, Department of Mechanical Engineering, 3-1-1, Nakagaito, Daito, Osaka, Japan Email : knambu.mech@ge.osaka-sandai.ac.jp
Source: ICSP14 Milan
Doc ID: 2022065
Year of Publication: 2022
Abstract:
This study examined the effect of soft particle peening treatment on the fatigue strength
properties of copper alloys. Walnut, apricot, peach, and polyethylene particles were used as
the projectiles in the soft particle peening treatment. The hardness of these projectiles was
lower than that of copper alloys, and the particles were softer. Plane bending fatigue tests
showed that the number of cycles to failure increased at stresses of 140 MPa and 120 MPa
regardless of the projectile material. In addition, it is considered that apricot and
polyethylene particles are particularly effective in improving fatigue strength when compared
with each projectile material. The results of hardness measurement showed that the
hardness increased in all the projectile materials. In addition, apricot and polyethylene
showed particularly large increases in hardness. Surface roughness measurements showed
that surface roughness increased for all projectile materials. The increase in surface
roughness was the smallest for polyethylene. The results show that polyethylene particles
are effective in improving the fatigue strength of copper alloys among the particles used in
this study. The results of this study suggest that the soft particle peening treatment is
effective in improving the fatigue strength of copper alloys.
Keywords Shot peening, Soft Particle, Fatigue, Copper alloy
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